EE WAS HOLDING A 8LB BLEDGE HAMMER BEHIND A ELEVATOR CHAIN AS ANOTHER EE USED A 10 LB SLEDGE HAMMER TO DRIVE INT HE PIN THAT HOLDS THE CHAIN TOEGETHER, HE MISSED THE PIN AND STRUCK THE EE HOLD ING THE 8LB HAMMER IN THE LEFT HAND BREAKING HISLEFT HAND BREAKING HIS INDEX FINGER.